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The original running race is about 12 meters long.
A.Y
B.N
C.NG

A.A.Y
B.N

【参考答案】

C
解析：通过阅读题干可以知道是关于最初的比赛长度的，即属于第二个小标题下的。我们在第二句中可以知道How lo......

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